Question

Please help, I'll mark brainlist

Answer 1

7=x this is for the first one but you have to 1
3
=

2
1
1
3
=
x
21
31​=21x​
2
1
⋅
1
3
=
2
1
⋅

2
1
21
⋅
1
3
=
21
⋅
x
21
21⋅31​=21⋅21x​
Multiply the numbers
Cancel multiplied terms that are in the denominator
7
=
2
1
⋅

2
1
7
=
21
⋅
x
21
7=21⋅21x​
7
=

7
=
x
7=x
7
=

7
=
x
7=x